Xref: utzoo sci.med:15121 sci.bio:2735 Path: utzoo!utgpu!jarvis.csri.toronto.edu!cs.utexas.edu!tut.cis.ohio-state.edu!snorkelwacker!spdcc!denbeste From: denbeste@spdcc.COM (Steven Den Beste) Newsgroups: sci.med,sci.bio Subject: Re: Caffeine questions... Message-ID: <1790@ursa-major.SPDCC.COM> Date: 21 Feb 90 23:39:17 GMT References: <2569@leah.Albany.Edu> <1990Feb21.153415.9369@pmafire.UUCP> Reply-To: denbeste@ursa-major.spdcc.COM (Steven Den Beste) Organization: S.P. Dyer Computer Consulting, Cambridge MA Lines: 10 In article <1990Feb21.153415.9369@pmafire.UUCP> reiser@pmafire.UUCP (Steve Reiser) writes: >Caffeine is medically classified as a mild habit-forming drug. Addiction >is called caffeinism and is usually evident in those consuming over 500 >mg/day (3-8 cups/day depending on its strength) . Caffeine is similar to >adenosine in the brain ( a vasodilator). Caffeine blocks out adenosine >causing blood vessels to constrict which is why it is used in many headache >remedies. Actually, since caffeine withdrawal is one of the major causes of headaches, a nostrum containing caffeine makes that headache go right away, yessir!